One-Shot Color Astronomical Imaging: In Less Time, For Less Money! (The Patrick Moore Practical Astronomy Series)

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Product Description

This book shows amateur astronomers how to use one-shot CCD cameras, and how to get the best out of equipment that exposes all three color images at once. Because this book is specifically devoted to one-shot imaging, "One-Shot Color Astronomical Imaging" begins by looking at all the basics - what equipment will be needed, how color imaging is done, and most importantly, what specific steps need to be followed after the one-shot color images are taken.

What is one-shot color imaging? Typically, astronomical cooled-chip CCD cameras record only one color at a time - rather like old-fashioned black & white cameras fitted with color filters. Three images are taken in sequence - in red, blue, and green light - and these are then merged by software in a PC to form a color image. Each of the three images must be taken separately through a suitable color filter, which means that the total exposure time for every object is more than tripled. When exposure times can run into tens of minutes or even hours for each of the three colors, this can be a major drawback for the time-pressed amateur.

"One-Shot Color Astronomical Imaging" describes the most cost-effective and time-efficient way for any amateur astronomer to begin to photograph the deep-sky.

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One-Shot Color Astronomical Imaging: In Less Time, For Less Money! (The Patrick Moore Practical Astronomy Series) Review

"One-Shot Color Astronomical Imaging" contains the information needed for a beginning astrophotographer to obtain excellent images. It emphasizes planning, good polar alignment, focusing, and calibration. Mr. Kennedy goes into practical detail about specific methods, probably based on years of experience with what it takes to get good images.

Mr. Kennedy&#8217;s book obviously favors one-shot color imaging over the use of monochrome imaging through RGB filters, but he does not compromise on quality. I am a beginning CCD photographer with a bit of a lazy streak, so that lack of compromise was initially disappointing. For example, I hope to use my telescope&#8217;s polar alignment routine without the tedious drift alignment method that the author describes in helpful detail. The author recommends that calibration using dark images occur during imaging rather than in processing after imaging. He describes in good detail how to take flats. He likes to separate colors and stack each color separately. Meanwhile I would like to use the freeware DeepSkyStacker to process my main images and dark frames at the same time and hope that clean optics will let me avoid flats altogether. Mr. Kennedy describes his processing steps in some detail, but he refers to imaging control and processing programs generically. I wish he had included a DeepSkyStacker-based workflow for some of his methods. In coming months I will attempt not to follow some of his guidance on polar alignment and initial processing methods but, if my results are poor, I will be checking this book carefully for advice. On page 156 Mr. Kennedy makes the point that results count, so any photographer should use the methods that meet the photographer's goals.

The existence of this book raised my confidence that one-shot color imaging will work. Mr. Kennedy has given me good ideas, reinforced other ideas, and has provided a fine reference for the future when my own shortcuts donR17;t work. I&#8217;m grateful for his excellent work to produce this book. I recommend it.

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